just do what they say. when they say solder resistors to wires. do it. i tried to be cool and solder it directly to the pcb. well now IDK if teh servo works. it's all finicky

I always do this method, it always works! Just make sure to use precision resistors with a tolerance of 1% or 2%, more than that it gets the servo confused slightly. I once used a 5% tolerance resistor unknowingly and all that happened was i had to send a pulse of 153 to center it . a pulse of 103 to make it go to the leftmost position, a pulse of 203 to go to the rightmost position